Boring-tool



(No Model.) v V G. W. BAKER.

- BORING TOOL. N0. 293,397. PatentedFeb, 12,-1884.

iiumm Z y WITNESSES INVENTOR ATTORNEYS N. PETERS, Phobliihogmphir. Wallfng m D. C-

UNI-Tm STATES Paran /r @FFIQE.

GEORGE W. BAKER, OF WILMINGTON, DELANVARE.

BORING-TOOL.

SPECIFICATION forming part of Letters Patent No. 293,397, dated February 12, 1884.

' Application filed June 23, 1883. (No model.)

To all whom if may concern,

Be it known that I, G.W. BAKER, a citizen of the United States, residing at Wilmington, in the county of New Castle and State of 'Delaware, have invented certain newand useful Improvements in Boring-Tools; and I do here by declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l of the drawings is a representation of this invention and is a perspective view. Fig. 2 is a longitudinal section. Fig. 3 is a detail, showing the sleeve in perspective. Figs. 4. and 5 are details, showing the cutterholder and cutter in perspective.

This invention has relation to lathe attachments; and it consists in the construction and novel arrangement of an axially-hollow sleeve having an enlargement of its bore near one end and opposite notches in the rim or end of said enlargement, and a cutter-holding stem having the enlarged and slotted end fit- V designates a metallic sleeve, preferably made neatly within the end-chamber of the bore of the sleeve. Through the enlargement is extends a transverse slot, Z, of sufficient size to permit the passage of I a transverse cutter, m,

the lateral wings or cutting portions whereof project from the sides of the enlargement. On the threaded end h of the stem is provided a nut, 2', which is designed to be turned. up against the outer end of the sleeve, drawing the stem through the sleeve sufficiently to cause the wings of the cutter to become firmly engaged with the notches of the sleeve end.

In this manner the cutteris firmly secured to the sleeve.

1? represents a holding-block, designed to be fastened to the slide-rest. a socket, a", through which the boring bar is passed, being adjustable therein to project more or less, according to requirement. A set It is provided with screw, 3, extending through a threaded perforation in the top of the socket, serves to hold the boring-bar rigidlyin position after adjust-- ment. I

In makingthe boring-bars for mills, it may be preferable-to use a slot and tapering key having the enlargement k, to fitwithin the enlargement of the sleeve-bore, and provided with a transverse. slot, Z, to receive the cutter m, the wings of which fit over the notches e, and provided at its opposite end with a thread to receive the lOck-nutz,substautial1y as specified.

In testimony whereof I affix my signature in presence of two witnesses.

' GEORGE W. BAKER.

WVitnesses:

MAURICE P. SATTERTHWAITE,

\VM. W. PRIToHErr. 

